Well drilling fluids and process for drilling wells

Patent · Tue Apr 26 04:00:00 EDT 1988

OSTI ID:7229832

Hale, A H; Lawson, H F

A composition is described comprised of: (a) a aqueous base, (b) a clayey material suspended in the aqueous base, (c) a water-soluble sulfonated styrene-maleic anhydride copolymer having a molecular weight of about 500 to about 10,000, (d) a water-soluble methacrylate copolymer having a molecular weight of about 500 to about 30,000 consisting of polymerized units of an alkali metal salt of acrylic acid and an alkali metal salt of methacrylic acid, the combined total weight of the polymers of (c) and (d) present in the composition being in the range of about 0.05 to about 10.0 pounds per barrel of composition and the weight ratio of the polymer of (c) to the polymer of (d) being in the range of about 90:10 to about 5:95.

• Assignee: Great Lakes Research Corp., Elizabethton, TN
• Patent Number(s): US 4740318
• OSTI ID: 7229832
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLIC ACID
ALKALI METAL COMPOUNDS
ALKYLATED AROMATICS
ANHYDRIDES
AQUEOUS SOLUTIONS
AROMATICS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CLAYS
COPOLYMERS
DICARBOXYLIC ACIDS
DISPERSIONS
DRILLING
DRILLING FLUIDS
FLUIDS
HYDROCARBONS
MALEIC ACID
METHACRYLATES
MIXTURES
MONOCARBOXYLIC ACIDS
NATURAL GAS WELLS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
QUANTITY RATIO
SOLUTIONS
STYRENE
WELL DRILLING
WELLS